The phrase "twin transformation" can be used in written English to refer to a situation in which two individuals or things undergo a significant change or development together.
Example: The twin transformation of our company and its main competitor has completely reshaped the industry landscape.
A more equitable partitioning of the twin transformation strain is necessary.
The model allows twinning to be driven either by the stress in the parent crystal (matrix reduction), in which case all of the twin transformation strain is assigned to the matrix, or by the stress in the twin (twin propagation), in which case all of the twin transformation strain is assigned to the twin.
A detailed comparison between the model predictions and the neutron diffraction data reveals that assigning all of the twin transformation strain either to the matrix or to the twin is too one-sided, leading to excessive relaxation and hardening effects.
It is suggested that the stress and hardening assigned to a newly formed twin is of less importance to the performance of the model than the partitioning of the twin transformation strain.
We present here a numerical study of the distribution of the local stress state associated with deformation twinning in Mg, both inside the twinned domain and in its immediate neighborhood, due to the accommodation of the twinning transformation shear.
We have performed two types of twinning transformation simulations with: (i) the twin completely embedded inside a single crystal and (ii) the twin front terminating at a grain boundary.
Special care was taken that reflections related by the twinning transformation were both contained in the test set.
The data were thus reprocessed in the monoclinic spacegroup P21 (a=50.25 Å, b=223.31 Å, c=50.20 Å, β=101.47°) and the twinning transformation (l, − k, h) was identified.
Molecular dynamics simulations showed that the present potential is capable of reproducing various manners of plastic deformation, e.g., dislocation nucleation and propagation, deformation twinning, phase transformation, etc.
Observation of Fe 33Ni revealed a substructural change from fine transformation twins in the midrib and twinned region to several sets of screw dislocations in the untwinned region during growth.
Dislocation mechanisms for shock-induced twinning and omega transformation are proposed and critically discussed.
